Найдите пропущенные значения:

\(\displaystyle (-20t^{\,15}+16t^{\,5})(5t^{\,8}-3t^{\,6})=\)

\(\displaystyle =\)[?||-][ ]\(\displaystyle (5t^{\,8}-3t^{\,6})\)[?|+|-][ ]\(\displaystyle (5t^{\,8}-3t^{\,6})\)